An in situ STM and DTS study of the extremely pure [EMIM]FAP/Au(111) interface.

An in situ STM and DTS study of the extremely pure [EMIM]FAP/Au(111) interface.
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极纯 [EMIM]FAP/Au(111) 界面的原位 STM 和 DTS 研究

DOI:
10.1002/cphc.201100873
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发表时间:
2012
期刊:
Chemphyschem : a European journal of chemical physics and physical chemistry
影响因子:
--
通讯作者:
F. Endres
F. Endres
中科院分区:
--
文献类型:
--
作者:
N. Borisenko;S. Zein El Abedin;F. Endres

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本文采用原位扫描隧道显微镜(STM)、距离隧道光谱(STM)和循环伏安法(CV)研究了空气和水稳定的离子液体1-乙基-3-甲基咪唑三(五氟乙基)三氟磷酸盐([EMM] FAP)与Au(111)之间的界面层结构。原位STM测量表明,在IL/Au(111)界面的阴极和阳极区域均可探测结构化界面层。这些层的结构取决于施加的电极电位、后续STM扫描的次数和扫描速率。此外,第一次STM扫描的结果表明,在ocp(− 0.2 V)和− 2.0 V之间的阴极电位范围内,第一次STM扫描期间的隧穿势垒似乎没有显著变化。
Herein the structure of the interfacial layer between the air‐ and water‐stable ionic liquid 1‐ethyl‐3‐methylimidazolium tris(pentafluoroethyl)trifluorophosphate ([EMIM]FAP) and Au(111) is investigated using in situ scanning tunneling microscopy (STM), distance tunneling spectroscopy (DTS) and cyclic voltammetry (CV) measurements. The in situ STM measurements reveal that structured interfacial layers can be probed in both cathodic and anodic regimes at the IL/Au(111) interface. The structure of these layers is dependent on the applied electrode potential, the number of subsequent STM scans and the scan rate. Furthermore, first DTS results show that the tunneling barrier during the 1st STM scan does not seem to change significantly in the cathodic potential regime between the ocp (−0.2 V) and −2.0 V.
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